- In the Arctic, any breach in the icy barrier can be a lifeline.
在北极 每一处破冰的地方都是一条生命线 - Musk oxen create their own.
麝牛创造了自己的生命线 - These giants have the strength to smash through the frozen crust
这种体型巨大的动物有足够的力量砸出冰窟窿 - to graze on the vegetation below.
再吃下面的植物 - The ice-breakers create an opening for other over-winterers.
麝牛破冰也为其它越冬的动物创造机会 - Flocks of ptarmigan make unusual grazing companions for the musk oxen,
成群的雷鸟与麝牛结成了紧密的伙伴关系 - whose entourage grows throughout the day.
它们的活动忙碌一整天
to graze on the vegetation below. 再吃下面的植物
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